Stockholders' Equity And Stock-Based Compensation (Summary Of Stock Options Outstanding And Exercisable) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2011 | Sep. 24, 2010 | Sep. 30, 2011
$1.25 - $1.25 [Member] | Sep. 30, 2011
$1.26 - $1.26 [Member] | Sep. 30, 2011
$2.08 - $6.28 [Member] | Sep. 30, 2011
$6.29 - $19.21 [Member] | Sep. 30, 2011
$19.22 - 28.12 [Member] | Sep. 30, 2011
$28.13 - $38.20 [Member] | Sep. 30, 2011
$38.21 - $48.14 [Member] | Sep. 30, 2011
$48.15 - $51.18 [Member] | Sep. 30, 2011
$51.19 And Above [Member] | |
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] | |||||||||||
| Range of exercise price lower limit | $ 1.25 | $ 1.26 | $ 2.08 | $ 6.29 | $ 19.22 | $ 28.13 | $ 38.21 | $ 48.15 | $ 51.19 | ||
| Range of exercise price upper limit | $ 1.25 | $ 1.26 | $ 6.28 | $ 19.21 | $ 28.12 | $ 38.20 | $ 48.14 | $ 51.18 | |||
| Shares, Outstanding Options | 5,801 | 5 | 19 | 161 | 282 | 64 | 1,526 | 539 | 507 | 2,698 | |
| Weighted Average Remaining Contractual Life (in years), Outstanding Options | 0.1 | 1.2 | 2.6 | 3.5 | 5.0 | 6.7 | 7.6 | 6.6 | 8.8 | ||
| Weighted Average Exercise Price, Outstanding Options | $ 45.19 | $ 35.05 | $ 1.25 | $ 1.26 | $ 2.08 | $ 15.68 | $ 22.45 | $ 31.61 | $ 43.38 | $ 48.35 | $ 59.22 |
| Shares, Options Exercisable | 2,721 | 5 | 19 | 161 | 282 | 60 | 1,052 | 248 | 343 | 551 | |
| Weighted Average Exercise Price, Options Exercisable | $ 1.25 | $ 1.26 | $ 2.08 | $ 15.68 | $ 22.08 | $ 31.17 | $ 42.81 | $ 48.25 | $ 52.50 | ||